<p>A paragraph</p>
<pre><code class="language-A">Here is code in
backtick fences</code></pre>
<p>B paragraph</p>
<pre><code class="language-B">Here is code in
tilde fences</code></pre>
<p>C paragraph</p>
<pre><code class="language-`C~">Alternative
tilde fences</code></pre>
<p>D paragraph ```~D` Invalid use of backtick fences</p>
<pre><code>
This will be read as
part of a codeblock
that ends with the file</code></pre>
